#include<stdio.h>
#include<string.h>

typedef struct //结构体 
{
       char xh[12];
       char name[20];
       char xb[8];
       char year[8];
       char bz[800];
}Student;

void stdudent_ll()
       {
	      Student Stu;
          FILE *fp;
          int flag=1;
           fp=fopen("back.txt","a+"); 
          if(fp==NULL)
           {
		   printf("open file error!");
           } 
          else
           {
                 while(flag==1)
                     {
                         printf("input student_学号:");
                         scanf("%s",Stu.xh);
                         printf("input student_姓名:");
                          scanf("%s",Stu.name);
                         printf("input student_性别:");
                         scanf("%s",Stu.xb);
                         printf("input student_年龄:");
                         scanf("%s",Stu.year);
                         printf("input student_备注:");
                         scanf("%s",Stu.bz);
                        printf("是否录入(是 输入 1 否 输入 2)\n");
                          int f;
                         scanf("%d",&f);
                         if(f==1)
                            {
   	                            fprintf(fp,"\n");
   	                            fprintf(fp,"");
                                fprintf(fp,"%s %s %s %s %s ",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
                            }     
                        printf(" press '1'to continue,'0' exit:");
                        scanf("%d",&flag);
                     }    
            }
            fclose(fp);
            
            printf("已录入成功\n"); 
       }
       
void stdudent_xs()
{
	FILE *fp; 
    char ch;
	int n=1;
	fp=fopen("student.txt","a+");
             if(fp==NULL) 
                 {
                     printf("无法打开文件\n"); 
                    n=0; 
                 } 
	         ch=fgetc(fp); 
             while(ch!=EOF) 
                {
                    putchar(ch); 
                    ch=fgetc(fp); 
                }
            printf("\n");
}

void stdudent_bc()
{
    FILE *fp=fopen("back.txt","r");
	
	char jiey[20]={};Student Stu;
	if(fp==NULL)	
       {
       	printf("");
	   }
	else
	{
	FILE *fm=fopen("student.txt","w");
		while(!feof(fp))
		{
		
			fscanf(fp,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
			if(strcmp(jiey,Stu.xh)!=0)
			{
				fprintf(fm,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				fprintf(fm,"\n");
			}
			strcpy(jiey,Stu.xh);
		}
		fclose(fm); 
	  } 
	  fclose(fp);printf("已保存\n");
}

void stdudent_sc()
{
 FILE *fp;
            int dot=1;
            char target[20],jiey[12]={};
            Student Stu;
            fp=fopen("student.txt","a+");
			while(dot==1)	
			{
				printf("输入学号,退出按确定");
				scanf("%s",target);
				FILE *out;out=fopen("back.txt","w"); /*out是充当临时文件作用*/
			 	while(!feof(fp))
				 	{
					 fscanf(fp,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				 			if(strcmp(target,Stu.xh)!=0&&strcmp(Stu.xh,jiey)!=0)
				 		{
				 			fprintf(out,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				 			fprintf(out,"\n");
						  }
						  strcpy(jiey,Stu.xh); 
					 }
					 rewind(fp);rewind(out);fclose(out);
				 dot=0;  
			}
			printf("已删除，请保存\n"); fclose(fp); 
}
	
	
void stdudent_xg()
{
  char mm[16],ymm[16];
	int flag=1;
	FILE *fm;
	fm=fopen("mima.txt","r+");
	fscanf(fm,"%s",ymm);
	fclose(fm);
	printf("请输入密码:");
    while(flag==1)
     {
    	scanf("%s",mm);
    	if(strcmp(ymm,mm)==0)
    	{
    		 FILE *fp;
            int dot=1;int m=0;
            char target[20],jiey[12]={};
            Student Stu;
            fp=fopen("student.txt","a+");
            while(dot==1)	
			{
				printf("输入学号,退出按0\n");
				char s[5]={0};
				scanf("%s",target);
				 if(strcmp(target,s)!=0)
				 {
				 	
				 	FILE *out;out=fopen("back.txt","w"); /*out是充当临时文件作用*/
					
				 	while(!feof(fp))
				 	{
					    fscanf(fp,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				 			if(strcmp(target,Stu.xh)!=0&&strcmp(Stu.xh,jiey)!=0)
				 		{
				 			fprintf(out,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				 			fprintf(out,"\n");
						  } 
				 		else if(strcmp(target,Stu.xh)==0&&strcmp(Stu.xh,jiey)!=0)
				 		{
				 			printf("%s %s %s %s %s\n",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
							printf("是否修改（是 输入 1 and 否 输入 2）\n");
							int b;scanf("%d",&b);
							if(b==1);
							{
							printf("请输入学号");scanf("%s",Stu.xh);
				 			printf("请输入姓名");scanf("%s",Stu.name);
				 			printf("请输入性别");scanf("%s",Stu.xb);
				 			printf("请输入年龄");scanf("%s",Stu.year);
				 			printf("请输入备注");scanf("%s",Stu.bz);
				 		    fprintf(out,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				 		    fprintf(out,"\n"); m=1;
				 			}	 
				 		    if(b==2)
				 			{
				 			fprintf(out,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
				 			fprintf(out,"\n");
				 			}	 
						 }
						strcpy(jiey,Stu.xh); 
					}
					 rewind(fp);rewind(out); fclose(out); 
					 if(m==0) printf("no find\n");
				 }
				 dot=0; fclose(fp);flag=0; 
			}
        }
        else
        {
        	printf("密码输入错误");
			printf("再次输入按 1  退出按  2\n");
			int a;
			scanf("%d",&a);
			if(a==2)
			{
				flag=0;
			 } 
			 if(a==1)
			 {
			 	printf("请再次输入"); 
			 }
		}
	}
}


 void stdudent_cx()
{
	 FILE *fp;
     int n,flag=0;
     char target[30],s[3]={0},jiey[20]={123};
      Student Stu;
      int dot=0;
	 fp=fopen("student.txt","a+");
	  if(fp==NULL) 
      {
         printf("无法打开文件\n"); 
      }  
	while(dot==0)
	{
		printf("        ***请输入查询方式***");
		printf("           ***0.退出***\n");
        printf("           ***1.按学号***\n");	
	    printf("           ***2.按姓名***\n");	 
	    printf("           ***3.按性别***\n");	
	    printf("           ***4.按年龄***\n");  
		scanf("%d",&n);
	    while(n!=0)
	     {				
	         if(n==1)
	             {
	                  printf("退出按0\n");printf("请输入学号\n");
	                 gets(target);	 
	            }
	          else if(n==2)
	            {
                     printf("退出按0\n");printf("请输入姓名\n");
                     gets(target);	 
	            }
	        else if(n==3)
	            {
	                printf("退出按0\n");printf("请输入性别\n");
                    gets(target); 
	            }
	          else if(n==4)
	            {
	                printf("退出按0\n");printf("请输入年龄\n");
	                gets(target);
	             }
	         gets(target);
        	if(strcmp(target,s)!=0)
	         {  
	             while(!feof(fp))
	                 {
	                     fscanf(fp,"%s %s %s %s %s",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
	                     if((strcmp(target,Stu.xh)==0||strcmp(target,Stu.name)==0||strcmp(target,Stu.year)==0||strcmp(target,Stu.xb)==0)&&strcmp(Stu.xh,jiey)!=0)
	                        {
	                            printf("%s %s %s %s %s\n",Stu.xh,Stu.name,Stu.xb,Stu.year,Stu.bz);
                                flag=1;
	                        }
	                        strcpy(jiey,Stu.xh);
	                 }
	        }
	        else
	          {
	             dot=1;flag=1;n=0;
	          }
	       if(flag==0)
	        {
	             printf("no find\n");
	        }
	         n=0;
        }
	    if(n==0)
	    {
		   dot=1;
	    }
	}
	printf("\n");	
}
   	     
int main()
{
	printf("\t\t\t班级档案管理系统\n"); 
	char mm[16],ymm[16];
	int flag=1,q=0;
	FILE *fm;
	fm=fopen("mima.txt","r+");
	printf("请输入密码:"); 
	fscanf(fm,"%s",ymm);
	fclose(fm);
	while(flag==1)
	{
		int zhong=1;
		scanf("%s",mm);
		while(zhong==1)
	    {
		   if(strcmp(mm,ymm)==0)
	        {     
	         printf("               *********请选择系统功能项*********\n");
          	 printf("               *******1*学生基本信息录入*********\n");
	         printf("               *******2*学生基本信息显示*********\n");
	         printf("               *******3*学生基本信息保存*********\n");
	         printf("               *******4*学生基本信息删除*********\n");
      	     printf("               *******5*学生基本信息修改*********\n");
	         printf("               *******6*学生基本信息查询*********\n");
	         printf("               *******7*****退出系统*************\n"); 
	         printf("请输入：");
			 int n; 
	         scanf("%d",&n);
			 switch(n)
	             {
		             case 1:stdudent_ll();break;
		             case 2:stdudent_xs();break;
		             case 3:stdudent_bc();q=1;break;
		             case 4:stdudent_sc();break;
		             case 5:stdudent_xg();break;
		             case 6:stdudent_cx();break;
		             case 7:zhong=0;flag=0;if(q==0) {remove("back.txt");}  break;	
					}    
	        }
	       else
	        {   
		     int m;zhong=0;
			 printf("密码错误\n"); 
		     printf("继续按 1  退出按  2\n");
			 scanf("%d",&m);
		     if(m!=1)
		     {	     	
				 flag=0;
		     } 
		     else
		     {
		     	printf("请再次输入密码:\n");
			 }
            } 
	    }
	}
}